Blue sea slugs were believed to prey on the Portuguese man-of-war, which contains highly poisonous nematocysts, and uses the nematocysts for defense by incorporating them into the tips of its lateral ...

Monterey Bay Aquarium Research Institute scientists have discovered Bathydevius caudactylus, a new species of glowing sea slug that lives deep in the ocean.

Stinging cells, produced by cnidarians such as jellyfish and anemones, are one of ocean creatures' most effective defences. This method of protection can keep almost all predators at bay - but not the ...